<template>
  <div class="xtx-cart-page">
    <div class="container">
      <XtxBread>
        <XtxBreadItem to="/">首页</XtxBreadItem>
        <XtxBreadItem>购物车</XtxBreadItem>
      </XtxBread>
      <div class="cart">
        <table>
          <thead>
            <tr>
              <!-- 因为组件不能通过v-model 直接改变vuex的数据 所以通过:modelValue去绑定数据 -->
              <th width="120"><XtxCheckbox :modelValue="isAllEffectSelected" @change="handleIsAll">全选</XtxCheckbox></th>
              <th width="400">商品信息</th>
              <th width="220">单价</th>
              <th width="180">数量</th>
              <th width="180">小计</th>
              <th width="140">操作</th>
            </tr>
          </thead>
          <!-- 有效商品 -->
          <tbody>
            <tr v-for="item in effectiveList" :key="item.skuId">
            <!-- @change="函数(子传父的参数)" 函数(子传父的参数) ===  (子传父的参数) => {return 其他函数(子传父的参数,其他参数)} 外面的箭头函数是自定义事件触发的回调  返回了一个函数的执行-->
              <td><XtxCheckbox :modelValue="item.selected" @change="(selected) => handleSelected(selected, item)" /></td>
              <td>
                <div class="goods">
                  <RouterLink :to="`/goods/${item.id}`"
                    ><img :src="item.picture" alt=""
                  /></RouterLink>
                  <div>
                    <p class="name ellipsis">{{ item.name }}</p>
                    <p class="attr">商品规格: {{ item.attrsText }}</p>
                  </div>
                </div>
              </td>
              <td class="tc">
                <p>&yen;{{ item.nowPrice }}</p>
              </td>
              <td class="tc">
                <XtxNumbox
                  :showTitle="false"
                  :modelValue="item.count"
                  :max="item.stock"
                  @change="(count) => changeCount(count, item)" />
              </td>
              <td class="tc">
                <p class="f16 red">&yen;{{ item.nowPrice * item.count }}</p>
              </td>
              <td class="tc">
                <p><a href="javascript:;">移入收藏夹</a></p>
                <p><a class="green" @click="delCart(item)">删除</a></p>
                <p><a href="javascript:;">找相似</a></p>
              </td>
            </tr>
            <tr v-if="effectiveList.length === 0">
              <td colspan="6">
                <div class="cart-none" style="text-align: center;">
                  <img src="~@/assets/images/none.png" alt="">
                  <p>购物车内暂时没有商品</p>
                  <div class="btn" style="margin: 20px">
                    <XtxButton type="primary" @click="$router.push('/')">继续逛逛</XtxButton>
                  </div>
                </div>
              </td>
            </tr>
          </tbody>
          <!-- 无效商品 -->
          <tbody v-if="ineffectiveList.length > 0">
            <tr>
              <td colspan="6"><h3 class="tit">失效商品</h3></td>
            </tr>
            <tr v-for="goods in ineffectiveList" :key="goods.skuId">
              <td></td>
              <td>
                <div class="goods">
                  <RouterLink :to="`/goods/${goods.id}`"
                    ><img :src="goods.picture" alt=""
                  /></RouterLink>
                  <div>
                    <p class="name ellipsis">{{ goods.name }}</p>
                    <p class="attr">{{ goods.attrsText }}</p>
                  </div>
                </div>
              </td>
              <td class="tc">
                <p>&yen;{{ goods.nowPrice }}</p>
              </td>
              <td class="tc">{{ goods.count }}</td>
              <td class="tc">
                <p>&yen;{{ (goods.nowPrice * goods.count).toFixed(2) }}</p>
              </td>
              <td class="tc">
                <p><a class="green" href="javascript:;">删除</a></p>
                <p><a href="javascript:;">找相似</a></p>
              </td>
            </tr>
          </tbody>
        </table>
      </div>
      <!-- 操作栏 -->
      <div class="action">
        <div class="batch"></div>
        <div class="total">
          共 {{effectiveTotal}} 件有效商品，已选择 {{selectedAllCounts}} 件，商品合计：
          <span class="red">¥{{selectedAllPrice}}</span>
          <XtxButton type="primary" @click="pay">下单结算</XtxButton>
        </div>
      </div>
    </div>
  </div>
</template>
<script>
import { computed } from 'vue'
import { useStore } from 'vuex'
import { message } from '@/components/Message'
import { useRouter } from 'vue-router'
export default {
  name: 'XtxCartPage',
  setup () {
    const store = useStore()
    const router = useRouter()
    // 有效商品列表
    const effectiveList = computed(() => {
      return store.getters['cart/effectiveList']
    })
    // 失效的商品列表
    const ineffectiveList = computed(() => {
      return store.getters['cart/ineffectiveList']
    })
    // 已选中的商品个数
    const selectedAllCounts = computed(() => {
      return store.getters['cart/selectedAllCounts']
    })
    // 已选中的总价
    const selectedAllPrice = computed(() => {
      return store.getters['cart/selectedAllPrice']
    })
    // 有效商品总数
    const effectiveTotal = computed(() => {
      return store.getters['cart/effectiveTotal']
    })
    // 全选状态
    const isAllEffectSelected = computed(() => {
      return store.getters['cart/isAllEffectSelected']
    })
    // 单选
    const handleSelected = (selected, goods) => {
      console.log('selected', selected)
      console.log('goods', goods)
      store.dispatch('cart/asyncSingleCheck', { goods, selected })
    }

    // 全选  1.通过getters配置默认选中状态  2. 由于getters中没有set 所以通过组件的自定义事件接收子组件传出来的数据
    // 3.遍历vuex中的数据 将传出来的全选状态进行赋值
    const handleIsAll = (selected) => {
      console.log('全选状态', selected)
      store.dispatch('cart/asyncCheckEffectAll', selected)
    }

    // 删除  1.点击删除按钮传入商品   2. 通过商品的skuId 在vuex中找到对应项删除
    const delCart = async (goods) => {
      await store.dispatch('cart/asyncDelCart', goods)
      message({
        type: 'success',
        text: '删除成功'
      })
    }

    // 修改数量 与修改单选逻辑一致
    const changeCount = (count, goods) => {
      console.log(count, goods)
      store.dispatch('cart/asyncChangeCount', { count, goods })
    }

    // 去结账了
    const pay = () => {
      // 判断登录没有
      if (!store.state.user.profile.token) {
        message({
          type: 'error',
          text: '请先登录'
        })
        router.push('/login')
        return
      }
      // 选择的商品数量不能为0
      if (selectedAllCounts.value === 0) {
        message({
          type: 'error',
          text: '请选择商品'
        })
        return
      }
      router.push('/settlement')
    }
    return {
      effectiveList,
      ineffectiveList,
      selectedAllCounts,
      selectedAllPrice,
      effectiveTotal,
      isAllEffectSelected,
      handleSelected,
      handleIsAll,
      delCart,
      changeCount,
      pay
    }
  }
}
</script>
<style scoped lang="less">
.tc {
  text-align: center;
  .xtx-numbox {
    margin: 0 auto;
    width: 120px;
  }
}
.red {
  color: @priceColor;
}
.green {
  color: @xtxColor;
}
.f16 {
  font-size: 16px;
}
.goods {
  display: flex;
  align-items: center;
  img {
    width: 100px;
    height: 100px;
  }
  > div {
    width: 280px;
    font-size: 16px;
    padding-left: 10px;
    .attr {
      font-size: 14px;
      color: #999;
    }
  }
}
.action {
  display: flex;
  background: #fff;
  margin-top: 20px;
  height: 80px;
  align-items: center;
  font-size: 16px;
  justify-content: space-between;
  padding: 0 30px;
  .xtx-checkbox {
    color: #999;
  }
  .batch {
    a {
      margin-left: 20px;
    }
  }
  .red {
    font-size: 18px;
    margin-right: 20px;
    font-weight: bold;
  }
}
.tit {
  color: #666;
  font-size: 16px;
  font-weight: normal;
  line-height: 50px;
}
.xtx-cart-page {
  .cart {
    background: #fff;
    color: #666;
    table {
      border-spacing: 0;
      border-collapse: collapse;
      line-height: 24px;
      th,
      td {
        padding: 10px;
        border-bottom: 1px solid #f5f5f5;
        &:first-child {
          text-align: left;
          padding-left: 30px;
          color: #999;
        }
      }
      th {
        font-size: 16px;
        font-weight: normal;
        line-height: 50px;
      }
    }
  }
}
</style>
